ieee1284_ecp_fwd_to_rev man page

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IEEE1284_ECP_FWD_(3)                                      IEEE1284_ECP_FWD_(3)



NAME
       ieee1284_ecp_fwd_to_rev,   ieee1284_ecp_rev_to_fwd   -   ECP  direction
       switching

SYNOPSIS
       int ieee1284_ecp_fwd_to_rev (struct parport *port);

       int ieee1284_ecp_rev_to_fwd (struct parport *port);


DESCRIPTION
       These functions are used to switch directions when in ECP mode. On  ne-
       gotiation  to  ECP  mode  the  direction  is  forward  (in other words,
       host-to-peripheral). Use ieee1284_ecp_fwd_to_rev to switch from forward
       to  reverse, and ieee1284_ecp_rev_to_fwd to switch from reverse to for-
       ward.


       They act on the parallel port  associated  with  port,  which  must  be
       claimed.


RETURN VALUE
       E1284_OK
              Direction switched successfully.


       E1284_NOTIMPL
              The  port  lacks the required capability. This could be due to a
              limitation of this version of libieee1284, or a hardware limita-
              tion.


       E1284_INVALIDPORT
              The port parameter is invalid (for instance, perhaps the port is
              not claimed).


AUTHOR
       Tim Waugh <twaugh@redhat.com>.



                                                          IEEE1284_ECP_FWD_(3)

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